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3271 Ul (1982 RB)
Classification: Amor [NEO]          SPK-ID: 2003271
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .395867985128419 1.1615e-07  
a 2.101721575511026 3.3879e-08 au
q 1.26971729011255 2.3383e-07 au
i 25.07050400019739 1.3103e-05 deg
node 158.8162187568392 1.447e-05 deg
peri 159.0775409258467 8.3268e-05 deg
M 146.9061969974157 0.00013731 deg
tp 2458546.350525366657
(2019-Mar-03.85052537)
0.00041381 TDB
period 1112.91296221411
3.05
2.6909e-05
7.367e-08
d
yr
n .3234754308942451 7.8214e-09 deg/d
Q 2.933725860909503 4.729e-08 au
  Orbit Determination Parameters
   # obs. used (total)      188  
   data-arc span      13651 days (37.37 yr)  
   first obs. used      1982-09-14  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58391  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 14:27:45  

Additional Information
 Earth MOID = .276557 au 
 Jupiter MOID = 2.49547 au 
 T_jup = 3.533 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456871.5 (2014-Aug-02.0) TDB
Reference: JPL 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .395369240326096 1.1578e-07  
q 1.271296624330161 2.3315e-07 au
tp 2456320.460095752065
(2013-Jan-27.96009575)
0.00036293 TDB
node 158.8486336965512 1.4478e-05 deg
peri 159.0160852712857 8.3384e-05 deg
i 25.05724059103162 1.3097e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      188  
   data-arc span      13651 days (37.37 yr)  
   first obs. used      1982-09-14  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58391  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 14:27:45  

Additional Information
 Jupiter MOID = 2.49547 au 
 T_jup = 3.533 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.340470046798655E-14 -2.691925567058051E-14 2.248011553374287E-11 -2.894318265678764E-13 5.605904175892155E-12 1.070289720831815E-13
q -2.691925567058051E-14 5.435856767841954E-14 -4.013262463655748E-11 5.163217976179741E-13 -1.016684071322115E-11 -2.131189889291287E-13
tp 2.248011553374287E-11 -4.013262463655748E-11 1.317200276630734E-7 -1.663881826115338E-9 2.981453551499003E-8 2.797989655930358E-10
node -2.894318265678764E-13 5.163217976179741E-13 -1.663881826115338E-9 2.096147768920393E-10 -5.475588461164514E-10 8.095570048603426E-11
peri 5.605904175892155E-12 -1.016684071322115E-11 2.981453551499003E-8 -5.475588461164514E-10 6.952856938395003E-9 -1.083124300461811E-11
i 1.070289720831815E-13 -2.131189889291287E-13 2.797989655930358E-10 8.095570048603426E-11 -1.083124300461811E-11 1.715351467578556E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.4   n/a MPO435729  

3271 Ul (1982 RB)          Discovered 1982-Sep-14 by Schuster, H.-E. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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